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Proceedings Paper

Cause of absorption band shift of disperse red-13 attached on silica spheres
Author(s): Byoung-Ju Kim; Hyung-Deok Kim; Na-Rae Kim; Byeong-Gyu Bang; Eun-Hye Park; Kwang-Sun Kang
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Paper Abstract

A reversible color change and large absorption band shift have been observed for the disperse red-13 (DR-13) attached on the surface of the monodisperse silica spheres. Two step synthetic processes including urethane bond formation and hydrolysis-condensation reactions were used to attach the DR-13 on the surface of the silica spheres. After the reaction, the characteristic absorption peak at 2270 cm-1 representing the –N=C=O asymmetric stretching vibration disappeared, and the a new absorption peak at 1700 cm-1 corresponding the C=O stretching vibration appeared. A visual and reversible color change was observed before and after wetting in alcohol. Although the absorption peak of DR-13 in alcohol is at 510 nm, the absorption peak shifts to 788 nm when it is dried. The absorption peak shifts to 718 nm when it is wetted in alcohol. This result can be explained by the formation of intramolecular charge transfer band.

Paper Details

Date Published: 20 August 2015
PDF: 10 pages
Proc. SPIE 9549, Physical Chemistry of Interfaces and Nanomaterials XIV, 95490P (20 August 2015); doi: 10.1117/12.2187686
Show Author Affiliations
Byoung-Ju Kim, Kyungil Univ. (Korea, Republic of)
Hyung-Deok Kim, Kyungil Univ. (Korea, Republic of)
Na-Rae Kim, Kyungil Univ. (Korea, Republic of)
Byeong-Gyu Bang, Kyungil Univ. (Korea, Republic of)
Eun-Hye Park, Kyungil Univ. (Korea, Republic of)
Kwang-Sun Kang, Kyungil Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9549:
Physical Chemistry of Interfaces and Nanomaterials XIV
Sophia C. Hayes; Eric R. Bittner, Editor(s)

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